
X458 L3 Service Manual
27
N0/weak signal trouble shooing
No or weak signal
Inspect the antenna and
antenna connector to see
if there’s any distortion
Replace the defective
components.
Put a false antenna at RF PA
IC to see if there’s any signal
Replace RF PA IC.
Make a false antenna at
SAW501 or SAW502,
check if there’s any
signal
Saw filter is damaged,
replace it.
Replace X801/26M
oscillator to check if
the problem is solved.
Resolder or replace
CPU MT6260
END
YES
NO
YES
NO
YES
NO
OK
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Summary of Contents for X458
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